Automatic stamping production line of multi-connecting-rod press

Abstract

The invention discloses a multi-connecting-rod press punching automatic production line, which belongs to the technical field of punching machines, and comprises a punching machine box arranged above a base, four support columns arranged between the punching machine box and the base, a multi-connecting-rod gear transmission group arranged in the punching machine box, an operation table fixedly mounted at the top of the base, and a lower die arranged at the top of the operation table. The device comprises four supporting columns, a same sliding block box is connected among the four supporting columns in a sliding mode, four piston connecting rods are arranged in the sliding block box and connected with a multi-connecting-rod gear transmission set, a same fixing plate is fixedly installed among the four piston connecting rods, and four symmetrically-arranged pressing rods are fixedly installed at the bottom of the fixing plate. A power source of oil injection action directly comes from stamping main motion (pressing down of the piston connecting rod), an additional electric or pneumatic pump is not needed, the piston connecting rod drives the piston plate to compress air in the driving box, pressure gas is generated, and energy recovery and utilization are achieved.

Description

Technical Field

[0001] This invention belongs to the field of stamping machine technology, specifically relating to an automated production line for multi-link press stamping. Background Technology

[0002] Multi-link presses are widely used in sheet metal stamping due to their advantages such as smooth operation, low noise, energy efficiency, and high performance. Modern manufacturing has placed higher demands on the automation and intelligence of stamping production lines and the quality of stamped parts, requiring not only high production cycles but also high-precision, low-damage stamping capabilities. Before stamping, existing presses typically rely on independent industrial robots or dedicated centering mechanisms for feeding and positioning sheet metal. While effective, these devices significantly increase the overall cost, floor space, and complexity of the control system. For small to medium-sized stamped parts or production scenarios with limited space, this configuration is neither economical nor flexible. Furthermore, when changing molds between multiple presses, the centering program needs to be readjusted, impacting production efficiency. Additionally, to reduce friction between the sheet metal and the mold during stamping and prevent scratches and cracks, lubricant is usually applied. Traditional lubrication methods are mostly manual spraying or independent electric / pneumatic spray systems. Manual spraying suffers from uneven lubrication, low efficiency, reliance on manual labor, and significant waste. Independent automatic spray systems require additional power sources and control units, increasing equipment costs and energy consumption. Moreover, neither method can adaptively control the timing and amount of oil spraying according to the stamping stroke, easily leading to insufficient or excessive lubrication, and excess oil mist can pollute the workshop environment. To address the aforementioned issues, this application proposes an automated production line for multi-link press stamping. Summary of the Invention

[0003] In response to the problems in related technologies, this invention proposes an automated production line for multi-link press stamping to overcome the aforementioned technical problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An automatic stamping production line for multi-link presses includes a stamping machine housing mounted on a base. Four support columns are arranged between the stamping machine housing and the base. A multi-link gear transmission assembly is installed inside the stamping machine housing. An operating table is fixedly installed on the top of the base. A lower die is installed on the top of the operating table. The same slide box is slidably connected between the four support columns. The slide box contains four piston rods. The four piston rods are connected to the multi-link gear transmission assembly. The same fixing plate is fixedly installed between the four piston rods. Four symmetrically arranged pressure rods are fixedly installed at the bottom of the fixing plate. The same mounting plate is fixedly installed at the bottom of the four pressure rods. An upper die is installed at the bottom of the mounting plate. An adaptive oil injection mechanism includes a fixed frame, which is fixedly installed at the bottom of the slider box. Grooves are provided on the inner walls of the front and rear sides of the fixed frame, and multiple nozzles are installed in the grooves. The nozzles are connected to the piston connecting rod in a transmission manner. The automatic alignment and clamping mechanism has two swing arms that are slidably mounted above the lower mold. Two stamping boxes are fixedly mounted on the top of the base, and the stamping boxes are connected to the corresponding swing arms via a transmission connection.

[0005] Preferably, the adaptive oil injection mechanism further includes two oil storage tanks, which are respectively fixedly installed on the front and rear sides of the slider box. Injection boxes are fixedly installed on both the front and rear sides of the fixed frame, and the injection boxes are interconnected with the corresponding multiple nozzles.

[0006] The two oil storage tanks allow for the supply of oil to multiple nozzles via the injection box, enabling the oil to be evenly sprayed onto the sheet metal. This provides lubrication during stamping and reduces scratches caused by friction.

[0007] Preferably, two drive boxes are fixedly installed on the bottom inner wall of the slider box. The drive boxes are slidably connected to two corresponding piston rods, and the bottom ends of the two piston rods on the same side are fixedly installed with the same piston plate, which is in contact with the inner wall of the drive box.

[0008] The piston plate is moved by the downward pressing piston rod. The moving piston plate is pressed against the inner wall of the drive box, which in turn compresses the space below the piston plate, thereby generating driving energy.

[0009] Preferably, a conduit is installed on the top of the oil storage tank, the bottom end of the conduit is connected to the corresponding liquid injection box, and the top end of the conduit is located in the liquid in the oil storage tank.

[0010] The oil in the storage tank can be injected into the injection box through the conduit, and the conduit is located inside the liquid in the storage tank to maintain the draining state.

[0011] Preferably, a pressure injection pipe is installed at the bottom of the drive box, the pressure injection pipe is connected to the corresponding oil storage tank, and the pressure injection pipe is located at the top of the oil storage tank and above the liquid.

[0012] The air pressure generated by the compression inside the drive box is discharged through the injection pipe and injected into the oil storage tank, thereby compressing the liquid in the oil storage tank.

[0013] Preferably, a compression plate is slidably connected to the inner wall of the oil storage tank, the compression plate is in close contact with the inner wall of the oil storage tank, and the compression plate is slidably connected to two conduits.

[0014] Gas injected into the oil tank through the injection pipe pushes the extrusion plate downwards, and the extrusion plate squeezes the oil below, thus causing the oil in the oil tank to be discharged through the conduit under pressure.

[0015] Preferably, the automatic alignment and clamping mechanism further includes four push rods, which are slidably mounted on the top of the two stamping boxes respectively, and the bottom ends of the two push rods are fixedly mounted with the same push plate, which is in contact with the inner wall of the stamping box.

[0016] The four push rods are pushed downward by the slider box, and the push rods drive the push plate to move. The push plate can squeeze the internal space of the stamping box by sticking to the inner wall of the stamping box.

[0017] Preferably, two extrusion boxes are fixedly installed on the top of the stamping box, and two top rods are fixedly installed on the side of the two swing rods that are far apart from each other. The top rods are slidably connected to the corresponding extrusion boxes, and an air injection pipe is installed at the bottom of the extrusion box. The air injection pipe passes through the top of the stamping box and extends to the bottom of the push plate.

[0018] The air squeezed inside the stamping box is discharged through the air injection pipe and injected into the extrusion box, which in turn acts on the ejector rod, causing the ejector rod to move out and drive the swing rod to push and straighten the placed material plate, so that the material plate is placed in the middle of the lower die, thus facilitating precise stamping.

[0019] In summary, the technical effects and advantages of this invention are as follows: The power source for the oil injection action comes directly from the main stamping motion (the downward pressure of the piston connecting rod), without the need for an additional electric or pneumatic pump. The piston connecting rod drives the piston plate to compress the air in the drive box, generating pressurized gas, thus realizing energy recovery and utilization.

[0020] By using air pressure to push the extrusion plate inside the oil tank, a stable pressure is indirectly applied to the oil, allowing the oil to be delivered to the nozzle through the conduit and injection box. This method avoids the complex structure of the oil pump and improves the reliability and response speed of the system.

[0021] The nozzles are arranged in the groove of the fixed frame, and large-area uniform spraying is achieved through multiple nozzles; the top of the conduit is always submerged in oil to form a liquid seal, preventing gas from escaping and ensuring the continuity of oil supply.

[0022] The pusher pushes the push plate to compress the air in the stamping box. The air pressure is transmitted to the extrusion box through the air injection pipe, which pushes the push rod and swing rod to achieve automatic centering and clamping of the sheet metal. By using air pressure to transmit power, the complex mechanical transmission chain is avoided. The structure is simple, the response is fast, and it is easy to maintain. The centering action occurs before the stamping starts and after the oil spraying, ensuring that the sheet metal is in the correct position before stamping, which improves the stamping accuracy and product quality, while avoiding the safety hazards caused by manual intervention. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 3 This is a schematic diagram of the multi-link gear transmission assembly and slider box structure of the present invention; Figure 4 This is a schematic diagram of the adaptive fuel injection mechanism of the present invention; Figure 5 This is a schematic diagram of the fixed frame structure of the present invention; Figure 6 This is a schematic cross-sectional view of the stamping box of the present invention; Figure 7 This is a schematic cross-sectional view of the oil storage tank of the present invention; Figure 8 This is a cross-sectional view of the drive box structure of the present invention.

[0024] In the picture: 1. Base; 2. Stamping machine housing; 3. Multi-link gear transmission group; 4. Adaptive oil spraying mechanism; 41. Fixing frame; 42. Groove; 43. Nozzle; 44. Drive box; 45. Piston plate; 46. Injection pipe; 47. Oil tank; 48. Guide pipe; 49. Extrusion plate; 410. Liquid injection box; 5. Automatic alignment and clamping mechanism; 51. Stamping box; 52. Push plate; 53. Push rod; 54. Air injection pipe; 55. Extrusion box; 56. Top rod; 57. Swing rod; 6. Operating table; 7. Lower mold; 8. Piston connecting rod; 9. Fixing plate; 10. Pressure rod; 11. Mounting plate; 12. Upper mold; 13. Slider box. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figure 1-8 An automatic stamping production line for multi-link presses includes a stamping machine housing 2 set above a base 1. Four pillars are set between the stamping machine housing 2 and the base 1. A multi-link gear transmission group 3 is set inside the stamping machine housing 2. An operating table 6 is fixedly installed on the top of the base 1. A lower mold 7 is set on the top of the operating table 6. The same slide box 13 is slidably connected between the four pillars. The slide box 13 is equipped with four piston rods 8. The four piston rods 8 are connected to the multi-link gear transmission group 3. The same fixing plate 9 is fixedly installed between the four piston rods 8. Four symmetrically arranged pressure rods 10 are fixedly installed at the bottom of the fixing plate 9. The same mounting plate 11 is fixedly installed at the bottom of the four pressure rods 10. An upper mold 12 is installed at the bottom of the mounting plate 11. The adaptive oil injection mechanism 4 includes a fixed frame 41, which is fixedly installed at the bottom of the slider box 13. The fixed frame 41 has grooves 42 on the inner walls of the front and rear sides. Multiple nozzles 43 are installed in the grooves 42 and are connected to the piston rod 8 in a transmission. The automatic alignment clamping mechanism 5 has two swing rods 57, which are slidably installed above the lower mold 7. Two stamping boxes 51 are fixedly installed on the top of the base 1, and the stamping boxes 51 are connected to the corresponding swing rods 57 in a transmission connection.

[0027] Reference Figure 4 and Figure 7 The adaptive oil spraying mechanism 4 also includes two oil storage tanks 47, which are fixedly installed on the front and rear sides of the slider box 13 respectively. Liquid injection boxes 410 are fixedly installed on both the front and rear sides of the fixed frame 41. The liquid injection boxes 410 are interconnected with the corresponding multiple nozzles 43. A conduit 48 is installed on the top of the oil storage tank 47, and the bottom end of the conduit 48 is interconnected with the corresponding liquid injection box 410. The top end of the conduit 48 is located within the liquid in the oil storage tank 47. The two oil storage tanks 47 can supply liquid to the multiple nozzles 43 through the liquid injection boxes 410, allowing the oil to be evenly sprayed onto the sheet metal through the nozzles 43. This provides lubrication during stamping and reduces scratches caused by friction during stamping. The oil in the oil storage tank 47 can be injected into the liquid injection box 410 through the conduit 48, which is located within the liquid in the oil storage tank 47, maintaining a draining state.

[0028] Reference Figure 8 Two drive boxes 44 are fixedly installed on the bottom inner wall of the slider box 13. The drive boxes 44 are slidably connected to the corresponding two piston rods 8, and the bottom ends of the two piston rods 8 on the same side are fixedly installed with the same piston plate 45. The piston plate 45 is in contact with the inner wall of the drive box 44. A pressure injection pipe 46 is installed at the bottom of the drive box 44. The pressure injection pipe 46 is connected to the corresponding oil tank 47, and the pressure injection pipe 46 is located at the top of the oil tank 47 and above the liquid. The piston plate 45 is pushed to move by the downward pressing of the piston rod 8. The moving piston plate 45 can squeeze the space below the piston plate 45 by being in contact with the inner wall of the drive box 44, thereby generating driving energy. The air pressure generated by the compression in the drive box 44 is discharged through the pressure injection pipe 46 and injected into the oil tank 47, thereby squeezing the liquid in the oil tank 47.

[0029] Reference Figure 7A squeezing plate 49 is slidably connected to the inner wall of the oil storage tank 47. The squeezing plate 49 is in close contact with the inner wall of the oil storage tank 47, and the squeezing plate 49 is slidably connected to two conduits 48. Gas injected into the oil storage tank 47 through the injection pipe 46 pushes the squeezing plate 49 downward, and the squeezing plate 49 squeezes the oil below, so that the oil in the oil storage tank 47 is discharged through the conduits 48 under pressure.

[0030] Reference Figure 1 The automatic alignment clamping mechanism 5 also includes four push rods 53, which are slidably mounted on the tops of two stamping boxes 51. The bottom ends of the two push rods 53 are fixedly mounted with the same push plate 52, which fits against the inner wall of the stamping box 51. Two extrusion boxes 55 are fixedly mounted on the top of the stamping box 51. Two push rods 56 are fixedly mounted on the opposite sides of the two swing rods 57, and the push rods 56 are slidably connected to the corresponding extrusion boxes 55. An air injection pipe 54 is installed at the bottom of each extrusion box 55, penetrating the top of the stamping box 51 and... Extending to the bottom of the push plate 52, four push rods 53 are pushed downward by the slider box 13. The push rods 53 drive the push plate 52 to move. The push plate 52 can squeeze the internal space of the stamping box 51 by sticking to the inner wall of the stamping box 51. The air squeezed in the stamping box 51 is discharged through the air injection pipe 54 and injected into the extrusion box 55, which in turn acts on the push rod 56, causing the push rod 56 to move out and drive the swing rod 57 to push and straighten the placed material plate, so that the material plate is placed in the middle position of the lower mold 7, which facilitates precise stamping.

[0031] Working Principle: During operation, the material plate is placed on the operating table 6. The multi-link gear transmission group 3 in the stamping machine box 2 drives the piston connecting rod 8 to move downward. The downward pressing piston connecting rod 8 pushes the piston plate 45 to move. The moving piston plate 45, by adhering to the inner wall of the drive box 44, can compress the space below the piston plate 45, thereby generating driving energy. The air pressure generated by the compression in the drive box 44 is discharged through the injection pipe 46 and injected into the oil storage tank 47, thereby compressing the liquid in the oil storage tank 47. The gas injected into the oil storage tank 47 through the injection pipe 46 pushes the extrusion plate 49 to move downward. The extrusion plate 49 compresses the oil below, thereby causing the oil in the oil storage tank 47 to be discharged through the conduit 48 under pressure. The oil in the oil storage tank 47 can be injected into the injection box 410 through the conduit 48, and the conduit 48 is located in the liquid in the oil storage tank 47. Maintaining the draining state, the two oil storage tanks 47 can supply liquid to multiple nozzles 43 through the injection box 410, so that the oil can be evenly sprayed onto the plate through the nozzles 43. After the oil is sprayed, the piston connecting rod 8 continues to move downward. The piston connecting rod 8 drives the fixed plate 9 to move. The fixed plate 9 drives the upper mold 12 to perform a stamping operation on the material plate through the pressure rod 10 and the mounting plate 11. The four push rods 53 are pushed downward under the action of the slider box 13. The push rods 53 drive the push plate 52 to move. The push plate 52 can squeeze the internal space of the stamping box 51 by sticking to the inner wall of the stamping box 51. The air squeezed in the stamping box 51 is discharged through the air injection pipe 54 and injected into the extrusion box 55, which acts on the top rod 56, causing the top rod 56 to move out and drive the swing rod 57 to push and straighten the placed material plate, so that the material plate is placed in the middle position of the lower mold 7, which facilitates precise stamping.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-link press stamping automatic production line, comprising a press machine box (2) arranged above a base (1), four supports are arranged between the press machine box (2) and the base (1), a multi-link gear transmission group (3) is arranged in the press machine box (2), a operation table (6) is fixedly installed on the top of the base (1), a lower die (7) is arranged on the top of the operation table (6), characterized in that, The four pillars are slidably connected by the same slider box (13). The slider box (13) is provided with four piston rods (8). The four piston rods (8) are connected to the multi-link gear transmission group (3). The four piston rods (8) are fixedly installed with the same fixing plate (9). The bottom of the fixing plate (9) is fixedly installed with four symmetrically arranged pressure rods (10). The bottom of the four pressure rods (10) is fixedly installed with the same mounting plate (11). The bottom of the mounting plate (11) is installed with an upper mold (12). The adaptive oil injection mechanism (4) includes a fixed frame (41), which is fixedly installed at the bottom of the slider box (13). The fixed frame (41) has grooves (42) on both the front and rear inner walls. Multiple nozzles (43) are installed in the grooves (42), and the nozzles (43) are connected to the piston rod (8) in a transmission. The automatic alignment clamping mechanism (5) has two swing rods (57) which are slidably installed above the lower mold (7). Two stamping boxes (51) are fixedly installed on the top of the base (1), and the stamping boxes (51) are connected to the corresponding swing rods (57) in a transmission connection.

2. The automatic stamping production line for multi-link presses according to claim 1, characterized in that, The adaptive oil injection mechanism (4) also includes two oil storage tanks (47), which are fixedly installed on the front and rear sides of the slider box (13) respectively. The front and rear sides of the fixed frame (41) are fixedly installed with injection boxes (410), and the injection boxes (410) are connected to the corresponding multiple nozzles (43).

3. The automatic stamping production line for multi-link presses according to claim 2, characterized in that, Two drive boxes (44) are fixedly installed on the bottom inner wall of the slider box (13). The drive box (44) is slidably connected to the corresponding two piston rods (8), and the bottom end of the two piston rods (8) on the same side is fixedly installed with the same piston plate (45). The piston plate (45) is in contact with the inner wall of the drive box (44).

4. The automatic stamping production line for multi-link presses according to claim 3, characterized in that, The top of the oil storage tank (47) is equipped with a conduit (48), the bottom end of the conduit (48) is connected to the corresponding liquid injection box (410), and the top end of the conduit (48) is located in the liquid of the oil storage tank (47).

5. The automatic stamping production line for multi-link presses according to claim 4, characterized in that, The bottom of the drive box (44) is equipped with a pressure injection pipe (46), which is connected to the corresponding oil tank (47). The pressure injection pipe (46) is located at the top of the oil tank (47) and above the liquid.

6. The automatic stamping production line for multi-link presses according to claim 5, characterized in that, An extrusion plate (49) is slidably connected to the inner wall of the oil storage tank (47). The extrusion plate (49) is in close contact with the inner wall of the oil storage tank (47), and the extrusion plate (49) is slidably connected to two conduits (48).

7. The automatic stamping production line for multi-link presses according to claim 1, characterized in that, The automatic alignment clamping mechanism (5) also includes four push rods (53), which are slidably installed on the top of the two stamping boxes (51), and the bottom ends of the two push rods (53) are fixedly installed with the same push plate (52), which is in contact with the inner wall of the stamping box (51).

8. The automatic stamping production line for multi-link presses according to claim 7, characterized in that, Two extrusion boxes (55) are fixedly installed on the top of the stamping box (51). Two top rods (56) are fixedly installed on the side of the two swing rods (57) that are far apart from each other. The top rods (56) are slidably connected to the corresponding extrusion boxes (55). An air injection pipe (54) is installed at the bottom of the extrusion box (55). The air injection pipe (54) passes through the top of the stamping box (51) and extends to the bottom of the push plate (52).

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